Exodus 21:7
"If a man sells his daughter as a female servant, she will not go out as the male servants do.
Nehemiah 5:5
And now, though we share the same flesh and blood as our fellow countrymen, and our children are just like their children, still we have found it necessary to subject our sons and daughters to slavery. Some of our daughters have been subjected to slavery, while we are powerless to help, since our fields and vineyards now belong to other people."
Exodus 21:2-3
"If you buy a Hebrew servant, he is to serve you for six years, but in the seventh year he will go out free without paying anything.